Add https://adamws.github.io/kicad-git/repository.json to KiCad's repository list to use these packages:

{
    "packages": [
        {
            "$schema": "https://go.kicad.org/pcm/schemas/v1",
            "name": "Git plugin",
            "description": "KiCad plugin for git",
            "description_full": "Git actions directly from KiCad's PCB editor window",
            "identifier": "com.github.adamws.kicad-git",
            "type": "plugin",
            "author": {
                "name": "adamws",
                "contact": {
                    "web": "https://adamws.github.io"
                }
            },
            "license": "GPL-3.0",
            "resources": {
                "Homepage": "https://github.com/adamws/kicad-git",
                "Bug Tracker": "https://github.com/adamws/kicad-git/issues",
                "Sponsor": "https://ko-fi.com/adamws"
            },
            "versions": [
                {
                    "version": "0.4",
                    "status": "development",
                    "kicad_version": "7.0",
                    "download_sha256": "d159b366f4a532ca9bde517dadd491205a48a494e058db469c838715eb885174",
                    "download_size": 8774,
                    "install_size": 7966,
                    "download_url": "https://adamws.github.io/kicad-git/kicad_git-0.4.dev2+gd81ee48.zip"
                }
            ]
        }
    ]
}